The B12 had the E-series (1.3L and 1.5L for 87-89 models) and the GA SOHC series (1.4L and 1.6L for 90-91 models). Since yours is the 1.6L it falls in the second series.

It would be a wiser investment to do an engine swap since parts for the E-series and the GA SOHC are pretty hard to come by.

HTH